Gun strap swivel



sept. 1s, 1956 C, E. SPRAGUE 2,763,082

GUN STRAP SWIVEL Filed 0G12. 22, 1953 United States- Patent GUN STRAP SWIVEL Chester E. Sprague, Portland, Oreg.

Application October 22, 1953, Serial No. 387,573

1 'Claim. (Cl. 42-85) This invention relates generally to gun strap swivels of the type shown in U. S. Patent No. 2,078,591, issued April 27, 1937, to me and over which my present invention is an improvement.

While others have attempted to improve my previous device by making gun strap swivels which are quickly detachable from the gun, I have found that unusual detaching facility is not of particular interest since the gun straps are seldom removed when time is of particular importance.

I have found however that the users of these devices dislike unneeded projections on guns and generally have continued to use my previous swivels because of their rugged reliability and relatively small projection as compared with the so-called quick detachable devices. And I have encountered a sizable demand for a gun strap swivel having even less projection than my older device.

It is a principal object of my invention to provide a gun strap swivel with a minimum projecting height above the gun surface to which it is fastened.

It is a second object to provide such a swivel which is rugged in construction, simple in design, and not liable to inadvertent unfastening.

It is a third object to provide such a device which can be used interchangeably with my previous device and which uses the same swivel receiving socket as my previ.- ous device.

It should be known that threaded sockets for the attachment of gun strap swivels are marketed with differently threaded bores and that ditferently threaded swivel attaching screws are needed for them. For this reason gun stores have previously found it necessary to stock swivels with differently threaded screw attachment parts for replacement purposes.

It is therefore a fourth object to provide a gun swivel in which the attachment screw can be easily removed and replaced by the gun smith who will henceforth stock a variety of attachment screws instead of complete swivel devices.

It is a fifth object to provide a gun strap swivel having an attachment screw head which is at, lays close to the gun surface and is slotted for easy tightening or loosening by using a coin for a screw driver.

How these and other objects are attained will be understood from the following description of a preferred form of my device referring to the attached drawing in which:

Fig. 1 is a fragmentary side view of the barrel end of a rifle cut away to show a gun strap attached thereto by my invention.

Fig. 2 is a fragmentary side view of the butt end of a. n'e cut away to show a gun strap attached thereto by my invention.

Fig. 3 is a top end view of my improved swivel.

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Fig. 4 is a side view in partial section of my swivel combined with the gun insert socket with which it is used.

Fig. 5 is a side view in partial section of my swivel combined with a gun plate socket with which it can be used.

Like numerals refer to like parts in the several figures of the drawing.

Referring now to the drawing, in Figures 1 and 2 a rie is indicated as having a stock 11 at its'rear end and a forearm 12 partially surrounding the barrel 13 at the front end. Internally threaded sockets 14 are shown sunk into stock 11 and forearm 12. Although sockets 14 are pressed into place and held against turning by knurled section 15 imbedded in the wood they are further held securely in place in stock 11 by wood screw 16 and in forearm 12 by machine screw 17 for which latter purpose the inner end hole 18 of socket is threaded.

Gun strap 19 is looped at its front and rear ends through strap loops 20 of my improved device comprising a swivel clevis 21, an attachment screw 22 and strap loop 20.

Swivel clevis 21 could be shaped without bending from a solid bar of metal but I prefer to form it as shown for bending assembly over strap loop 20.

Attachment screw 22 of my improved swivel has an annular groove 23, sunk in its circumference and spaced from the at underside of its head a distance slightly greater than the thickness of clevis 21. The diameter of the smooth cylindrical part 24 of screw 22 is slightly smaller than the hole in clevis 21 through which it ex' tends. A common C-washer 25 is clamped in groove 23.

It is seen that while clevis 21 is freely swingable about screw 22 it is removably secured thereon by C-washer 25 with limited axial motion along the screw.

The threaded endy 26 or 27 of screw 22, as shown in Figs. 4 and 5 respectively, are sized to lit the particular socket installed or to be installed in the gun with which the swivel is to be used. By removing and replacing C-washer 25 a screw 22 suited to the socket to which it is to be mated can be quickly assembled with clevis 21 and loop 20 to provide my swivel as adapted to use with the particular socket.

In Fig. 5 a plate type socket 28 is shown which is adapted for use at either end of the gun.

It should be particularly noted that the attachment screw 22 is constructed with a relatively thin Wide head knurled at forty-five degrees on its outer edge 29 and provided with a relatively shallow but wide coin slot 30 across the top. With this screw head there is a minimum projection above the surface of the gun, the knurled edge provides for nger manipulation of the screw, and the coin slot provides a simple means for setting the screw securely in place or for loosening the screw when its removal is desired.

Having thus stated some of the objects of my invention, illustrated and described a preferred form of my invention, and explained its use, I claim:

A gun strap swivel for attaching a sling strap to a hunting rie, said swivel comprising: attachment means for attaching said swivel to said rie, a strap loop for attaching said sling strap to said swivel and a swivel member attaching said strap loop to said attaching means; said swivel member being formed with a first hole therethrough adjacent one of its ends and a second hole therethrough adjacent its other end, the axes of said holes being laterally spaced and mutually perpendicular; said attachment means comprising a headed screw, the head of said 

